Just back from the said house after installing adaware and spybot, running these found many dataminer, malware etc etc but did not cure the problem.the problem starts with (usually) going into control panel to have a look at printer, internet settings, etc, then it's 'windows has encountered a problem' details show various dll's not always the same, 3 different ones in this case things like 'ntdll.dll' has caused this problem,the next crash will be another dll, there is no incompatability in device manager all seems well there, my friend said that most of the problems seem to have started after installing some microsoft office app's a few days ago and appears to be getting worse this week anyone help ?